/**
 * Created by Administrator on 2015/12/21 0021.
 */
var xmlHttp;

function showUser(str){
    xmlHttp=GetXmlHttpObject();
    if(xmlHttp==null){
        alert("浏览器不支持HTTP Request");
        return;
    }
    var url="user.php";
    url=url+"?q="+str;
    url=url+"&id="+Math.random();
    xmlHttp.onreadystatechange=stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
}

function stateChanged(){
    if(xmlHttp.readyState==4||xmlHttp.readyState=="complete"){
        document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
    }
}
function GetXmlHttpObject(){
    var xmlHttp=null;
    try{
        xmlHttp=new XMLHttpRequest();
    }catch(e){
        try{
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }catch(e){
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}